EP1265332A1 - Barres omnibus amortis pour installations éoliennes - Google Patents

Barres omnibus amortis pour installations éoliennes Download PDF

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Publication number
EP1265332A1
EP1265332A1 EP02012186A EP02012186A EP1265332A1 EP 1265332 A1 EP1265332 A1 EP 1265332A1 EP 02012186 A EP02012186 A EP 02012186A EP 02012186 A EP02012186 A EP 02012186A EP 1265332 A1 EP1265332 A1 EP 1265332A1
Authority
EP
European Patent Office
Prior art keywords
busbar
elements
construction
damping
conductor rail
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02012186A
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German (de)
English (en)
Inventor
Franz Mitsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsch Franz
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP02012186A priority Critical patent/EP1265332A1/fr
Publication of EP1265332A1 publication Critical patent/EP1265332A1/fr
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/02—Open installations
    • H02G5/025—Supporting structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/54—Anti-seismic devices or installations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/002—Joints between bus-bars for compensating thermal expansion
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/06—Totally-enclosed installations, e.g. in metal casings
    • H02G5/066—Devices for maintaining distance between conductor and enclosure

Definitions

  • the invention relates to busbars and busbar constructions, which components with have damping properties and materials and so for installation in strong vibrating or moving building structures, in particular Wind turbines are suitable.
  • the towers of wind turbines become taller with increasing performance. at Inland wind turbines are installed on higher towers, so that these in the higher range of higher wind speeds with less turbulence work.
  • the towers are usually made of steel with a very low Material damping, so that the towers are largely undamped, which has the consequence that even the slightest excitation forces excite such a tower to strong vibrations.
  • the tower will have to the measure of water depth can be lengthened, which affects the vibratory capacity of the towers strengthened. At the same time there is an additional excitement from the waves.
  • wind turbines are subject to additional and particularly distinctive ones Forces caused primarily by the rotor movement as such, especially in the form of Unbalance, as well as partly extreme winds that come from different directions the rotor blades, the nacelle, the tower and the entire system act as a whole become.
  • the technical development of wind power constructions is now so far progressed that extremely powerful systems can be built.
  • the busbars or busbar constructions of the present invention have the particular advantage that they can get by with little cable even when high currents are required, can be easily and inexpensively installed in the tower of the wind turbine and, in particular, can be adapted to a wide variety of influences and forces due to their special design that can be exerted on a wind turbine, such as strong movements caused by wind or different thermal expansions due to different materials used, and therefore guarantee a high level of safety for material and people.
  • the busbars according to the invention safely conduct the current through the wind turbine tower even in the event of a short circuit; secondly, they bring damping into the tower, which leads to a reduction in the vibrations of the tower.
  • the busbar according to the invention is in one embodiment of the invention directly on Mast attached so that in the event of a short circuit, the stable mast serves as a load-bearing element.
  • the housing can for example by means of a screw or rivet on the tower wall of the wind turbine be attached.
  • the housing will here carried by the conductor rail itself and preferably shows for better reasons Stability at certain intervals holding devices (9), preferably brackets, on which around the housing parts are attached around and if necessary with fasteners (8) can be firmly connected to the housing.
  • the not self-supporting housing has under another advantage that it is better by decoupling parts Has thermal expansion compensation as a self-supporting housing (3), which in is made in one piece. The thermal expansion along the entire length of the rail can often lead to a problem in such systems.
  • the isolators (2, 5) of the busbars are made with material damping or as Friction damper designed so that according to the invention a damping of the tower by Busbars are made.
  • the power rails in the tower for example with a round cross-section can be divided into three in two units that are asymmetrically offset by 90 ° Units which are offset 120 ° symmetrically to each other, in four units which are 90 ° are symmetrically offset from one another, or in correspondingly larger units smaller angular misalignment.
  • three or four busbars used for a tower with 90 ° or 120 ° symmetrical offset as this means that the tower in is damped almost evenly in all directions.
  • Fig. 6 shows the cross-section of the tower two power rails.
  • the individual conductors are separated from one another by the elastic insulators.
  • two systems can be considered, namely (i) the friction damping between the insulator and the conductor and (ii) the damping due to the material properties of the insulator, which is firmly connected to the conductor.
  • the isolator can be designed as an additional unit, regardless of the damping elements.
  • the busbar contains one or more current conductors (1). These can consist of copper, aluminum, steel or other conductive materials or their alloys.
  • the current conductors are preferably rectangular, made of solid material or tube, since this enables a compact design to be achieved. In addition, such systems are easier and cheaper to manufacture. Since the current flows predominantly on the surface of the current conductors, they are preferably designed as hollow bodies. The preferably rectangular hollow body at the same time enables additional cooling of the conductor by the rising air. In addition, the hollow body creates a thicker structure of the entire element, which is advantageous for the damping of the damping layers which are thereby removed (friction or material damping). With a greater distance between the damping layers, the relative movement between the individual damping layers becomes larger, which means greater friction damping work with the same inclination of the tower.
  • the insulators (2) are made of non-conductive material, for example plastic.
  • the Insulator elements are preferably designed simultaneously as sliding elements or have In this embodiment, an additionally applied sliding layer made of the usual ones Materials with a low coefficient of friction, which is the current leading material or on an additional sliding layer applied to the current conductor when the Turmes rub.
  • the friction between the current conductors (1) and the insulators (2) Bending the tower acts as damping work, which affects the kinetic energy of the Converts tower into vibrations in work and thus the vibrations of the tower reduced.
  • the friction elements are pressed against each other by a preload.
  • the insulator elements are made of elastic materials which, if necessary, have a corresponding sliding layer on the surface in contact with the current conductor (1).
  • the elastic material of the insulator elements (2) causes further damping work and can intensify the above-mentioned effect.
  • the insulation material is designed to be damping at the same time. It consists of a plastic or elastomer with damping properties, ie the deformation work that is inserted into the material during the tower movement only comes back partially as springback force, while part of the movement work in the material is converted into heat.
  • the insulator which also has damping properties, is firmly connected to the conductor (for example, glued).
  • the elastomer materials according to the present invention essentially consist of a natural rubber, a natural rubber derivative or a suitable elastic polymeric plastic or plastic mixture.
  • the elastomer can have different hardness ("Shore hardness") and different damping properties, in accordance with the desired requirements.
  • Elastomers with a hardness of 20 to 100 Shore, in particular 30 to 80 Shore, are preferably used. The production of such elastomers of different hardness is known in the prior art and is sufficiently described in the relevant literature. Commercial natural rubbers or plastics are preferably used.
  • Suitable elastomers are: natural rubber, isoprene, butadiene, polynorbone, chloroprene, styrene butadiene, butyl, ethylene propylene, nitrile, polyurethane, acrylate, ethylene acrylate, silicone or fluorine rubbers or plastics.
  • the Busbar clamping elements (6) can be as in Fig. 1 shown, made by disc springs, by a resilient shape of the housing (Fig. 2, 3), by a resilient shape of the current conductor or the isolator friction elements or by additionally introduced springs, which are used as elastomer springs (Fig. 4, 5) or as steel springs can be executed.
  • the invention also relates to busbar constructions, which busbars of the above described type included.
  • the busbar is not directly with the wall of the Tower of the wind turbine connected via a fixed to the power rail connected compensating element (10, 12).
  • Such a construction according to the invention consists of a busbar and such an element.
  • the element serves this different forces, which on the busbar on the one hand and the tower wall on the other act to compensate, compensate or reduce.
  • An example of this is the different thermal expansion of the materials used, due to the considerable length, which busbar or tower have, can be considerable.
  • the conductor rails according to the invention are predominantly made of aluminum or copper or made according to suitable other materials, while the tower one Wind turbine mostly consists of a steel structure.
  • the compensating elements (10, 12) according to the invention can be pure elastomer elements, which can optionally be reinforced by other materials.
  • An example of this is rubber cams, which are attached to the rail or the building / tower wall at regular intervals.
  • the material or the construction of the said element (10, 12) must be such that it is able to move in the axial direction, i.e. along the Tower axis to perform damping work.
  • such a compensating element (10) consists of two tabs or elongated workpieces (10a) in the form of a joint piece, which are arranged parallel and at a distance from one another in such a way that the busbar is inserted at one end of the pair of tabs and is movable in the axial direction are attached, and the other end of the pair of tabs can also be connected to the tower wall in an axially movable manner.
  • the axial mobility of the link pair member between the busbar and the tower wall is achieved by correspondingly movable fastening devices (10b, 10c, 10b ', 10c'), which are parts of the compensating element (10) and can in particular be articulated or hinged devices or shafts.
  • the pair of lugs is therefore aligned so that its surfaces are aligned parallel to the longitudinal axis of the tower.
  • the pair of tabs consists of elastic material, for example metal or plastic, and can thus act as a leaf spring, which can additionally dampen forces acting vertically on them.
  • the compensating element (10) can contain further elastomer elements (10c) which are arranged in such a way, for example in the vicinity of the joint or hinge devices or shafts, that they can dampen or compensate for torsional forces.
  • Elastomer bushings can preferably be used here.
  • the compensating element can also be designed differently and can have a compact or open design.
  • the compensating elements preferably have the form of articulated members, which are attached at certain intervals along the busbar. Furthermore, they can also accommodate the neutral conductor (11) of the power supply both inside and outside the rail or the housing.
  • the compensating elements (10) thus have the main effect that a thermal expansion of the busbar in relation to the building / tower wall in the longitudinal direction (axial) can be compensated or reduced while maintaining the high rigidity required for tower / building damping in the direction of the tower. / Building wall (radial), so that the conductor rail can bend together with the tower when the tower / building is bent due to acting forces (e.g. wind, rotation).
  • acting forces e.g. wind, rotation
  • the compensating elements are simple link or leaf springs (12), preferably made of metal or plastic, which (or their surface) in contrast to the tab elements (10 ) are arranged essentially perpendicular to the longitudinal direction of the busbar or the tower and are thus able to fully or partially compensate for the axially acting forces, such as those which can occur, for example, in the case of different thermal expansion of the tower and the rail construction.
  • Fig. 1 shows a damping busbar with friction damping.
  • the screwing to the tower is done with a middle screw, which is passed through the current conductor.
  • the current conductor is made of solid material. To prevent short circuits, the screw is protected against the current conductor with a plastic sleeve.
  • Fig. 2 shows a conductor rail with solid material conductors.
  • the pretension required for friction is provided by a special shape of the cover.
  • the insulators are designed with a profile that prevents the busbars from sliding sideways.
  • Fig. 3 shows a conductor rail with solid material conductors.
  • the pretension required for friction is provided by a special shape of the cover.
  • additional side insulators prevent the busbars from moving sideways.
  • Fig. 4 shows current conductors made of solid material. The pre-tensioning is done by a pre-tensioned elastomer rail.
  • Fig. 5 shows a similar busbar as Fig. 4, but here the current conductors are made of rectangular tubing with the advantages described in the text.
  • Fig. 6 shows a cross section through a tower with two busbars offset by 90 °.
  • Fig. 7 shows a cross section (left part) and a side view of a busbar which is connected to the tower wall of a wind turbine in a housing (7) carried by the rail via a compensating element (10) acting as a joint.
  • Fig. 8 shows the compensating element (10) in two different enlarged views.
  • Fig. 9 shows the same cuts as Fig. 7 for a busbar, which is equipped with compensating elements (12) in the form of handlebar / leaf springs.
EP02012186A 2001-06-06 2002-06-03 Barres omnibus amortis pour installations éoliennes Withdrawn EP1265332A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02012186A EP1265332A1 (fr) 2001-06-06 2002-06-03 Barres omnibus amortis pour installations éoliennes

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP01113782 2001-06-06
EP01113782 2001-06-06
EP02012186A EP1265332A1 (fr) 2001-06-06 2002-06-03 Barres omnibus amortis pour installations éoliennes

Publications (1)

Publication Number Publication Date
EP1265332A1 true EP1265332A1 (fr) 2002-12-11

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EP02012186A Withdrawn EP1265332A1 (fr) 2001-06-06 2002-06-03 Barres omnibus amortis pour installations éoliennes

Country Status (1)

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EP (1) EP1265332A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1786080A1 (fr) * 2005-11-10 2007-05-16 General Electric Company Dispositif de barres omnibus
CN102545117A (zh) * 2010-12-18 2012-07-04 仝志红 新型电容型绝缘风电母线布置系统
EP2624393A1 (fr) * 2012-02-06 2013-08-07 Siemens Aktiengesellschaft Éolienne
CN103532062A (zh) * 2013-10-30 2014-01-22 四川扬中铂瑞电气设备工程有限公司 风力发电机管型母线槽
CN103545771A (zh) * 2013-11-12 2014-01-29 江苏士林电气设备有限公司 一种风电母线安装结构
WO2014198425A1 (fr) * 2013-06-10 2014-12-18 Siemens Aktiengesellschaft Système de barre omnibus doté d'un support flexible latéral
CN108595774A (zh) * 2018-03-28 2018-09-28 中国电力科学研究院有限公司 一种阻尼母线仿真计算模型建立方法及系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3751578A (en) * 1971-04-08 1973-08-07 Siemens Ag Metal-clad three-conductor high-voltage transmission line
US4204085A (en) * 1978-05-26 1980-05-20 Gould Inc. Seismic-proof bus duct joint
US5579217A (en) * 1991-07-10 1996-11-26 Kenetech Windpower, Inc. Laminated bus assembly and coupling apparatus for a high power electrical switching converter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3751578A (en) * 1971-04-08 1973-08-07 Siemens Ag Metal-clad three-conductor high-voltage transmission line
US4204085A (en) * 1978-05-26 1980-05-20 Gould Inc. Seismic-proof bus duct joint
US5579217A (en) * 1991-07-10 1996-11-26 Kenetech Windpower, Inc. Laminated bus assembly and coupling apparatus for a high power electrical switching converter

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1786080A1 (fr) * 2005-11-10 2007-05-16 General Electric Company Dispositif de barres omnibus
US7470860B2 (en) 2005-11-10 2008-12-30 General Electric Company Bus bar mounting arrangement
CN101005201B (zh) * 2005-11-10 2010-11-10 通用电器（加拿大）公司 母线的安装结构
CN102545117A (zh) * 2010-12-18 2012-07-04 仝志红 新型电容型绝缘风电母线布置系统
EP2624393A1 (fr) * 2012-02-06 2013-08-07 Siemens Aktiengesellschaft Éolienne
WO2014198425A1 (fr) * 2013-06-10 2014-12-18 Siemens Aktiengesellschaft Système de barre omnibus doté d'un support flexible latéral
CN103532062A (zh) * 2013-10-30 2014-01-22 四川扬中铂瑞电气设备工程有限公司 风力发电机管型母线槽
CN103545771A (zh) * 2013-11-12 2014-01-29 江苏士林电气设备有限公司 一种风电母线安装结构
CN103545771B (zh) * 2013-11-12 2016-04-13 江苏士林电气设备有限公司 一种风电母线安装结构
CN108595774A (zh) * 2018-03-28 2018-09-28 中国电力科学研究院有限公司 一种阻尼母线仿真计算模型建立方法及系统

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